By Topic

Communications Magazine, IEEE

Issue 11 • Date November 2010

Filter Results

Displaying Results 1 - 25 of 34
  • IEEE Communications Magazine

    Publication Year: 2010 , Page(s): c1
    Save to Project icon | Request Permissions | PDF file iconPDF (299 KB)  
    Freely Available from IEEE
  • Table of contents

    Publication Year: 2010 , Page(s): 2 - 4
    Save to Project icon | Request Permissions | PDF file iconPDF (174 KB)  
    Freely Available from IEEE
  • IEEE fellow - a prestigious professional recognition

    Publication Year: 2010 , Page(s): 6 - 8
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | PDF file iconPDF (391 KB)  
    Freely Available from IEEE
  • Message from the editor-in-chief

    Publication Year: 2010 , Page(s): 10
    Save to Project icon | Request Permissions | PDF file iconPDF (209 KB) |  | HTML iconHTML  
    Freely Available from IEEE
  • Hundreds of leading experts address global energy issues at first IEEE international conference on smart grid communications

    Publication Year: 2010 , Page(s): 12 - 15
    Save to Project icon | Request Permissions | PDF file iconPDF (2272 KB)  
    Freely Available from IEEE
  • Conference calendar

    Publication Year: 2010 , Page(s): 16
    Save to Project icon | Request Permissions | PDF file iconPDF (68 KB)  
    Freely Available from IEEE
  • ComSoc training in wireless communications

    Publication Year: 2010 , Page(s): 17
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1097 KB) |  | HTML iconHTML  

    As noted last month, ComSoc has found that wireless practitioners bring a wide range of backgrounds to the certification exam, in both their education and experience. Therefore, what were originally eligibility requirements have been changed to eligibility recommendations. Although it is now up to each individual to decide whether he or she is adequately prepared for the exam, prospective applicants should recognize that thorough preparation, comprising both training and on-the-job experience, is important for success in the exam. As noted in the 2011 issue of the Candidate¿s Handbook, ¿Applicants with a combination of a bachelor¿s degree or comparable education plus three or more years of professional experience ¿ or other similar level of preparation ¿ have been more successful on the examination than those with less preparation.¿ View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • R&D for broadband communications: a proposal to revitalize broadband R&D in the united states

    Publication Year: 2010 , Page(s): 18 - 28
    Save to Project icon | Request Permissions | PDF file iconPDF (601 KB) |  | HTML iconHTML  
    Freely Available from IEEE
  • Milica Stojanovic and Zoran Zvonar

    Publication Year: 2010 , Page(s): 30 - 31
    Save to Project icon | Request Permissions | PDF file iconPDF (2017 KB) |  | HTML iconHTML  
    Freely Available from IEEE
  • New products

    Publication Year: 2010 , Page(s): 32
    Save to Project icon | Request Permissions | PDF file iconPDF (238 KB) |  | HTML iconHTML  
    Freely Available from IEEE
  • Product spotlights

    Publication Year: 2010 , Page(s): 34
    Save to Project icon | Request Permissions | PDF file iconPDF (850 KB) |  | HTML iconHTML  
    Freely Available from IEEE
  • Global Communications Newsletter

    Publication Year: 2010 , Page(s): 1 - 4
    Save to Project icon | Request Permissions | PDF file iconPDF (1183 KB)  
    Freely Available from IEEE
  • X.25 Virtual Circuits - TRANSPAC IN France - Pre-Internet Data Networking [History of communications]

    Publication Year: 2010 , Page(s): 40 - 46
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2527 KB)  

    The following article , by Remi Despres, is the second on the history of X.25 systems to appear in this column. As noted by Dr. Despres, the previous article focused on the Canadian Datapac system. Earlier articles on packet switching in this column have included one on the history of the Arpanet/Internet and one on early British packet switching systems. What makes this article particularly distinctive, aside, of course, from the fact that it focuses on the major contributions of French engineers to the development of packet switching as well as to X.25 standardization, is that it carefully outlines the reasons for the choice of connection-oriented virtual circuits for the Transpac network, as contrasted with datagram-based packet switching adopted for Arpanet. Interestingly, Dr. Despres notes that the idea of using virtual-circuit connection-oriented packet switching in the Transpac development came from the British packet switching activity. It is to be noted that early commercial packet switching networks in the United States, such as Tymnet and Telenet, also adopted the virtual circuit paradigm. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Energy efficiency in communications

    Publication Year: 2010 , Page(s): 48 - 49
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | PDF file iconPDF (515 KB) |  | HTML iconHTML  
    Freely Available from IEEE
  • IEEE 802.3az: the road to energy efficient ethernet

    Publication Year: 2010 , Page(s): 50 - 56
    Cited by:  Papers (46)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (207 KB) |  | HTML iconHTML  

    Ethernet is the dominant wireline communications technology for LANs with over 1 billion interfaces installed in the U.S. and over 3 billion worldwide. In 2006 the IEEE 802.3 Working Group started an effort to improve the energy efficiency of Ethernet. This effort became IEEE P802.3az Energy Efficient Ethernet (EEE) resulting in IEEE Std 802.3az-2010, which was approved September 30, 2010. EEE uses a Low Power Idle mode to reduce the energy consumption of a link when no packets are being sent. In this article, we describe the development of the EEE standard and how energy savings resulting from the adoption of EEE may exceed $400 million per year in the U.S. alone (and over $1 billion worldwide). We also present results from a simulation-based performance evaluation showing how packet coalescing can be used to improve the energy efficiency of EEE. Our results show that packet coalescing can significantly improve energy efficiency while keeping absolute packet delays to tolerable bounds. We are aware that coalescing may cause packet loss in downstream buffers, especially when using TCP/IP. We explore the effects of coalescing on TCP/IP flows with an ns-2 simulation, note that coalescing is already used to reduce packet processing load on the system CPU, and suggest open questions for future work. This article will help clarify what can be expected when EEE is deployed. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A secure decentralized data-centric information infrastructure for smart grid

    Publication Year: 2010 , Page(s): 58 - 65
    Cited by:  Papers (24)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (260 KB) |  | HTML iconHTML  

    In recent years the power grid has been undergoing transformative changes due to the greater penetration of renewable energy sources and increased focus on power demand shaping. These innovative transformations on the grid require a flexible IP-based communication grid that is reliable and secure. In this article we describe an IPbased decentralized and data-centric information infrastructure that can reliably, securely, and cost-effectively support the operation and innovative applications of the next generation grid. The proposed infrastructure differs from a typical distributed system since it addresses the specific requirements of power applications such as security, distributed data sources, latency sensitive data transactions and real time event updates. The work presented here paves the way for a future data-centric power network infrastructure. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Challenges and enabling technologies for energy aware mobile radio networks

    Publication Year: 2010 , Page(s): 66 - 72
    Cited by:  Papers (121)  |  Patents (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (837 KB) |  | HTML iconHTML  

    Mobile communications are increasingly contributing to global energy consumption. In this article, a holistic approach for energy efficient mobile radio networks is presented. The matter of having appropriate metrics and evaluation methods that allow assessing the energy efficiency of the entire system is discussed. The mutual supplementary saving concepts comprise component, link and network levels. At the component level the power amplifier complemented by a transceiver and a digital platform supporting advanced power management are key to efficient radio implementations. Discontinuous transmission by base stations, where hardware components are switched off, facilitate energy efficient operation at the link level. At the network level, the potential for reducing energy consumption is in the layout of networks and their management, that take into account slowly changing daily load patterns, as well as highly dynamic traffic fluctuations. Moreover, research has to analyze new disruptive architectural approaches, including multi-hop transmission, ad-hoc meshed networks, terminal-to-terminal communications, and cooperative multipoint architectures. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Cell zooming for cost-efficient green cellular networks

    Publication Year: 2010 , Page(s): 74 - 79
    Cited by:  Papers (129)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1496 KB) |  | HTML iconHTML  

    Cell size in cellular networks is in general fixed based on the estimated traffic load. However, the traffic load can have significant spatial and temporal fluctuations, which bring both challenges and opportunities to the planning and operating of cellular networks. This article introduces a concept of cell zooming, which adaptively adjusts the cell size according to traffic load, user requirements and channel conditions. The implementation issues of cell zooming are then presented. Finally a usage case of cell zooming for energy saving is investigated. Centralized and distributed cell zooming algorithms are developed, and simulation results show that the proposed algorithms can greatly reduce the energy consumption, which leads to green cellular networks. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Guest editorial

    Publication Year: 2010 , Page(s): 80 - 81
    Save to Project icon | Request Permissions | PDF file iconPDF (358 KB) |  | HTML iconHTML  
    Freely Available from IEEE
  • A case study of a presence based end-user lookup service for the dynamic discovery of entities across technologies and domains

    Publication Year: 2010 , Page(s): 82 - 89
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (671 KB) |  | HTML iconHTML  

    End-users may wish to interact with entities (e.g., groups of persons or physical objects) that need to be discovered dynamically. The entities may even reside in domains where different technologies are used. This article presents a case study on the design and implementation of a novel lookup service for the dynamic discovery of entities across technologies and domains. This novel service allows end users to dynamically discover entities that meet specific constraints (e.g., interests or abilities, availability at a specific time or location, and/or affiliation(s)). It is a powerful enabler that may be used as a pillar for a wide range of other end-user services. The proposed architecture relies on presence service and RESTful Web services. The related security aspects are studied. A proof-of-concept prototype is built and its performance is evaluated. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Drive and share: efficient provisioning of social networks in vehicular scenarios

    Publication Year: 2010 , Page(s): 90 - 97
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1469 KB) |  | HTML iconHTML  

    Social Networks are one of the latest revolutions in networking, allowing users with common interests to stay connected and exchange information. They have enjoyed great success not only for traditional Internet users, but also for mobile users. Recent efforts are also being done to make social networks available within vehicles. However, to exploit social networks at their full potential in a vehicular context a number of technical challenges and design issues need to be faced. In this article, we analyze those challenges and present an innovative solution for providing Social services on the vehicle based on IP Multimedia Subsystem and Machine to Machine capabilities. To demonstrate the viability of the proposed scheme we present a social network service called Drive and Share which offers relevant information to vehicles using our proposed architecture. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Refinements and optimization of optical networks toward meeting the bandwidth challenge

    Publication Year: 2010 , Page(s): 98 - 99
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | PDF file iconPDF (429 KB) |  | HTML iconHTML  
    Freely Available from IEEE
  • Dynamic bandwidth allocation for long-reach PON: overcoming performance degradation

    Publication Year: 2010 , Page(s): 100 - 108
    Cited by:  Papers (10)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (259 KB) |  | HTML iconHTML  

    A passive optical network, with its inherent point to multi-point structure, allows for centralized placement of active equipment and possible extension of its boundary towards core networks. This property of the PON can be exploited for node consolidation where multiple central offices are replaced by a single one covering a larger service area. Such node consolidation is being particularly driven by the need for network operational cost saving, and is offering significant challenges to PONs. The degree of node consolidation that can be achieved is limited by the reach of conventional PON systems. In order to achieve a larger degree of node consolidation, an extension of the PON reach, beyond the conventional 20 km, is required. This article addresses the challenges of the dynamic bandwidth allocation, where increased reach results in a degradation of DBA performance and quality of service support. This degradation is a consequence of the increased propagation delay of the DBA messages exchanged between different PON elements. A potential solution to the performance degradation is the introduction of a multi-threaded DBA. In this article, we examine for both Gigabit PON and Ethernet PON, the extent to which DBA performance degradation can be reduced by exploiting multi-threading. It is found that for both standards, multi-threading, if done properly, can be used to mitigate the performance degradation due to the increased reach. To make bandwidth allocation efficient, new schemes for coordinating the multiple threads are required in long reach PON. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optical dynamic circuit services

    Publication Year: 2010 , Page(s): 109 - 117
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (673 KB) |  | HTML iconHTML  

    IP service, leased-line service and POTS service have been the three long-standing communication service offerings of providers. Recently, both commercial and research-and-education network providers have started offering optical dynamic circuit services. This article reviews these services, differentiates DCS from leased-line services, offers a classification of DCS, and proposes two new types of DCS. DCS are classified into two types: Specified-Duration Scheduled and Unspecified-Duration Unscheduled. SDS service is less flexible than UDU service in that it requires users to specify call durations, and is more complex (needs reservation schedulers), but it is the only efficient option if link bandwidth is divided into a small number of channels (e.g., 1 Gb/s circuits on a 10 Gb/s link for fast transfers of large files). For SDS offerings, if the mean call duration is small, then a distributed scheduler implementation may be required to handle the high call arrival load required to maintain high utilization levels. Finally, SDS is classified into two sub-types: Specified Start Time and Earliest Start Time, based on whether the user can only accept a start time from within its own specified set of start times, or whether it can accept any, preferably earliest, start time. The SST sub-type is useful for applications requiring the co-scheduling of network bandwidth with other resources, while the EST sub-type is ideal for file transfers. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Topics in automotive networking

    Publication Year: 2010 , Page(s): 118 - 119
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | PDF file iconPDF (399 KB) |  | HTML iconHTML  
    Freely Available from IEEE

Aims & Scope

IEEE Communications Magazine covers all areas of communications such as lightwave telecommunications, high-speed data communications, personal communications systems (PCS), ISDN, and more.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Osman Gebizlioglu
Huawei Technologies